OH3SW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP20

Receiver-side FT8 activity involving OH3SW, decoded by SO8OO in southeastern Poland. 8 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-21.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 8 FT8 messages attributed to OH3SW as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -13 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 8

First attributed message: 2026-09-21
Last attributed message: 2026-09-21 17:48 UTC

Observed FT8 message patterns

Attributed sample: 8 messages
Active dates: 1 UTC dates
Estimated median S/N: -13 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 1.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with OH3SW in decoded directed-looking exchanges:

9A1CCB · Croatia DL1LOD · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina LY3BFH · Lithuania YL3GAO · Latvia YL3KZ · Latvia DK7ZT · Fed. Rep. of Germany RM3ZK · European Russia

Most frequent locator attributed to OH3SW

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator: KP20 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-09-21 17:48 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTC	Band	OH3SW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 17:46	80m	- / -	DL5JMN	-3 / -	2	Partial capture
09-21 17:46	80m	- / -	HF5A	+1 / -	2	Partial capture
09-21 17:44	80m	-16 / -15	R2DDN	-8 / -12	3	Partial capture
09-21 17:43	80m	- / -	OH3EZ	-12 / -	3	Partial capture
09-21 17:43	80m	-14 / -3	DK7ZT	-1 / -12	4	✓ Full exchange observed
09-21 17:42	40m	- / -	RU3T	-9 / -	2	Partial capture
09-21 17:36	40m	- / -13	RC9WC	-6 / -	3	Partial capture
09-21 17:32	40m	- / -9	DL1LOD	+6 / -	5	✓ Closing fragment
09-21 17:29	40m	- / -7	RC9WC	-3 / -	3	Partial capture
09-21 17:29	40m	- / -	SQ7OBH	-4 / -	2	Partial capture
09-21 17:20	40m	- / -22	SP7TF	-2 / -	2	Partial capture
09-21 17:01	40m	- / -	PA7ZZ	-10 / -	2	Partial capture
09-21 17:00	40m	- / -4	RK3DJW	+4 / -	3	Partial capture
09-21 17:00	40m	- / -16	SP7TF	-1 / -	3	Partial capture
09-21 16:58	40m	- / -17	PD4HT	-4 / -	2	Partial capture
09-21 16:50	40m	- / -	PD4HT	-3 / -	2	Partial capture
09-21 16:47	40m	- / -	9A1CCB	+3 / -	4	✓ Closing fragment
09-21 16:40	40m	- / -10	YL3KZ	-9 / -	2	✓ Closing fragment
09-21 16:36	40m	- / -	E70SZ	-4 / -	4	Partial capture
09-21 16:34	40m	- / -	YL3GAO	-7 / -	2	✓ Closing fragment
09-21 16:30	40m	- / -	RZ4FWA	-7 / -	3	Partial capture
09-21 16:30	40m	- / -	E70SZ	-3 / -	5	Partial capture
09-21 16:20	80m	- / -	RK3AQ	-8 / -	2	Partial capture
09-21 16:19	80m	- / -20	RM3ZK	0 / -	11	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

80m

UTC    dB Audio  Message
174345 -13 2202  OH3SW OH3EZ KP11
174345  -1 1148  OH3SW DK7ZT RR73
174400 -13 1155  DK7ZT OH3SW 73
174415 -14 2202  OH3SW OH3EZ KP11
174430  -4 1155  CQ OH3SW KP20
174445  -7 1155  OH3SW R2DDN KO85
174445 -10 2202  OH3SW OH3EZ KP11
174500 -16 1155  R2DDN OH3SW -12
174515  -9 1155  OH3SW R2DDN R-15
174600 -12 1155  CQ OH3SW KP20
174645  -1 2400  OH3SW HF5A JO92
174645  +3  269  OH3SW DL5JMN JO60
174715  +3 2400  OH3SW HF5A JO92
174715  -9  269  OH3SW DL5JMN JO60
174800 -17 1155  CQ OH3SW KP20

40m

UTC    dB Audio  Message
172945  -3 2279  OH3SW RC9WC -07 (x3)
173215  +8 1189  OH3SW DL1LOD JO61 (x5)
173615  -8 2280  OH3SW RC9WC -13 (x3)
174015  -1 2521  OH3SW UB6OCP KN88
174045 -19 1309  OH3SW UB3BCE -22
174215 -10  780  OH3SW RU3T LO16 (x2)

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